平面型ディスプレイを用いた他覚的瞳孔視野計測技術

概要

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Conventional visual field tests for the early detection of visual loss lack reliability because fatigue or lack of attention leads to false results. To overcome such defects, several methods have been proposed. The method utilizing pupillary light reflex is a promising candidate. However, sufficient clinical sensitivity has not yet been achieved because of inflexible and rough light stimulus. The authors have developed a new flexible experimental pupillographic perimetry method which enables detailed light stimulus by using a flat panel display in addition to simultaneously measuring pupillary diameter in real-time with an infrared CCD camera. Preliminary evaluation experiments for a healthy normal individual demonstrated a decline in pupillary response at Mariotte blind spot where no retinal cells exist. This result indicates that the method can be a useful tool for the early detection of visual loss due to diseases such as glaucoma.
2005-03-10